• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Feline Cardiomyopathies
Feline Cardiomyopathies

... the lining of the chest drain into the atria, so if the function of the heart is significantly impaired, we can see an elevated pressure in these chambers and vessels. This can cause fluid to accumulate in the lungs or chest cavity, which is referred to as congestive heart failure. Cats with enlarge ...
Scintigraphic perfusion defects due to right ventricular
Scintigraphic perfusion defects due to right ventricular

... and septal wall akinesia. Left ventricular ejection fraction (EF) was severely reduced in eCG, (29%), continuous wave Doppler and colour Doppler e-CG showed a regular function of the bioprosthesis. The surface electrocardiogram revealed atrial fibrillation with a heart rate of approximately 90min an ...
Bio212-Mammalian Heart Dissection Instructions
Bio212-Mammalian Heart Dissection Instructions

... tendineae, (“heart strings”) that attach to the walls of the left ventricle. There are three flaps, so this valve is also called the tricuspid valve. 15. Fill the right atrium with water and allow it to trickle down into the right ventricle. Now GENTLY squeeze the right ventricle from the bottom up ...
PDF
PDF

... Generic) code. First letter V indicates that it pace only in ventricles, second letter v indicates that pacemaker sense the ventricle chamber and third letter I indicates that there is inhibition mode of response is used. VVI mode algorithm is shown in the figure 4. ...
measuring the heart rate
measuring the heart rate

Assessment of the stability of N-terminal pro-brain
Assessment of the stability of N-terminal pro-brain

Ben Franklin and Open Heart Surgery
Ben Franklin and Open Heart Surgery

... tively when their effort was mission oriented, and (c) the lag between initial discovery and final application was shortest when the scientist worked in areas targeted by his sponsor. Although the report stated that the study focused primarily on the physical and engineering sciences, and that only ...
Heart-Rate and EKG Monitor Using the
Heart-Rate and EKG Monitor Using the

... cardiac or heart muscle during a heartbeat. It provides very accurate evaluation of the performance of the heart. The heart generates an electrochemical impulse that spreads out in the heart in such a fashion as to cause the cells to contract and relax in a timely order and, thus, give the heart a p ...
aed awareness - Alex Dishman`s Portfolio
aed awareness - Alex Dishman`s Portfolio

...  Approximately 7,000 children suffer from Sudden Cardiac Arrest ...
Transthoracic Echocardiogram (TTE)
Transthoracic Echocardiogram (TTE)

... echo pictures. You may be asked to exhale or hold your breath for a few seconds. The pictures are recorded on videotape or printed on paper so the doctor can review them later. ...
Catheter Ablation versus Standard Conventional Treatment in
Catheter Ablation versus Standard Conventional Treatment in

... discretion of the investigator, but the investigator must have performed at least 50 AF ablation procedures, comprising pulmonary vein isolation, with the same approach. The ablation will be classified as acutely successful if: (1) all four PVs are isolated and (2) sinus rhythm is restored (if not a ...
A4.3.4.CardiacOutput
A4.3.4.CardiacOutput

Cardiac Pacemakers and Resynchronization Step by Step. An Illustrated Brochure
Cardiac Pacemakers and Resynchronization Step by Step. An Illustrated Brochure

... Normal QRS patterns during right ventricular pacing. Left ventricular endocardial pacing. Manifestations of myocardial infarction in the paced rhythm. Cardiac memory. Pacemaker alternans. Complications of pacemakers. Non–electrical complications. Electrical complications. Automatic mode switching. M ...
Document
Document

... 1. Blood within the pulmonary veins returns to the a. right atrium c. right ventricle b. left atrium d. left ventricle 2. Blood is carried by the capillaries in the myocardium by way of a. the coronary sinus c. coronary arteries b. the fossa ovalis d. coronary veins 3. Cardia output is about _______ ...
Regional Differences in Heart Failure with Preserved Ejection
Regional Differences in Heart Failure with Preserved Ejection

... of doubling of serum creatinine from 11.6% to 17.8% (p<0.001), increased hyperkalemia (≥ 5.5 mmol/L) 3.46 times from 8.9% to 25.2% (p<0.001), and reduced hyokalemia (serum potassium <3.5 mmol/L) 49% from 26.2% to 15.2% (p<0.001) [12]. In the Russia and Georgia group, all of these outcomes were simil ...
Cardiac Enzyme tests
Cardiac Enzyme tests

... eating before the test. Patients are strongly encouraged to follow their physician’s orders in order to maximize the accuracy of their test results. Although they can detect damage for any reason, cardiac enzyme tests are most commonly used to diagnose and monitor heart attacks. The enzyme test is a ...
Intraluminal Ascending Aorta Fibroma
Intraluminal Ascending Aorta Fibroma

... accurate determination of a male-to-female ratio.6 On twodimensional echocardiography, cardiac fibromas are seen as a single, bright, intramural, echogenic mass. CT scanning is often performed and might provide clues regarding tissue characterization, with central calcification suggestive of a cardi ...
Selected age-associated changes in the cardiovascular system
Selected age-associated changes in the cardiovascular system

... Systolic left ventricular function is unaffected by aging Under normal function without stress, no functional issues LV stiffening leads to slower filling and leaves older person more reliant on atrial contraction for blood pressure filling Left atrium thickens and dilates increasing risk of afib Am ...
ICD (implantable Cardioverter"Defibrillator)
ICD (implantable Cardioverter"Defibrillator)

... your leisure or vacation time. In certain cases there might be restrictions due to your underlying heart disease, which need to be discussed with your physician. The ICD registers your heart rhythm as electrical signals. This makes it impossible to completely shield the ICD from electrical currents ...
A4.3.4.CardiacOutput - Life Science Academy
A4.3.4.CardiacOutput - Life Science Academy

... towards the eye. You may have felt this pulse throbbing when you had a headache. o Brachial pulse: Use your Maniken® to visualize the brachial artery. Find this pulse, located at the bend of the arm, opposite the elbow. o Radial pulse: Use your Maniken® to visualize the radial artery. Locate the ra ...
Horse Stress Horse Sense - Performance Equine Nutrition
Horse Stress Horse Sense - Performance Equine Nutrition

... from Heart Disease,” The Lancet, 11 August, 1973: 293-296)1 by two truthseeking biochemists from University of Hull in England. (By the way, the New England Journal of Medicine looks up to The Lancet as the pinnacle of medical truth.) In any event, these enterprising scientists studied the hearts of ...
Emotional State Recognition via Physiological
Emotional State Recognition via Physiological

... estimated by sensing aspects of physiological state. Some Physiological Signals Used to Determine Emotional State 1. Skin Temperature (SKT) - Skin temperature changes are primarily driven by variations in blood flow. These local variations are mainly caused by changes in vascular resistance or arter ...
biopotentialselectrodesSaa
biopotentialselectrodesSaa

... Figure 5.20 Different types of microelectrodes fabricated using microelectronic technology (a) Beam-lead multiple electrode. (Based on Figure 7 in K. D. Wise, J.B. Angell, and A. Starr, "An Integrated Circuit Approach to Extracellular Microelectrodes." Reprinted with permission from IEEE Trans. Biom ...
rheumatic stenoses of all four cardiac valves: a case report
rheumatic stenoses of all four cardiac valves: a case report

... for confirming clinical findings and allows assessment of the severity of valvular stenosis and regurgitation. (Anatol ...
Matters of the heart - Imperial College London
Matters of the heart - Imperial College London

... – hypertrophic, dilated and arrhythmogenic right ventricular. The former affects one in 500 people and is the most common inherited cardiovascular disease, accounting for around 36 per cent of all sudden deaths in competitive athletes in the US. Because of this high mortality rate, it is of the utmo ...
< 1 ... 362 363 364 365 366 367 368 369 370 ... 762 >

Electrocardiography



Electrocardiography (ECG or EKG*) is the process of recording the electrical activity of the heart over a period of time using electrodes placed on a patient's body. These electrodes detect the tiny electrical changes on the skin that arise from the heart muscle depolarizing during each heartbeat.In a conventional 12 lead ECG, ten electrodes are placed on the patient's limbs and on the surface of the chest. The overall magnitude of the heart's electrical potential is then measured from twelve different angles (""leads"") and is recorded over a period of time (usually 10 seconds). In this way, the overall magnitude and direction of the heart's electrical depolarization is captured at each moment throughout the cardiac cycle. The graph of voltage versus time produced by this noninvasive medical procedure is referred to as an electrocardiogram (abbreviated ECG or EKG).During each heartbeat, a healthy heart will have an orderly progression of depolarization that starts with pacemaker cells in the sinoatrial node, spreads out through the atrium, passes through the atrioventricular node down into the bundle of His and into the Purkinje fibers spreading down and to the left throughout the ventricles. This orderly pattern of depolarization gives rise to the characteristic ECG tracing. To the trained clinician, an ECG conveys a large amount of information about the structure of the heart and the function of its electrical conduction system. Among other things, an ECG can be used to measure the rate and rhythm of heartbeats, the size and position of the heart chambers, the presence of any damage to the heart's muscle cells or conduction system, the effects of cardiac drugs, and the function of implanted pacemakers.
  • studyres.com © 2026
  • DMCA
  • Privacy
  • Terms
  • Report